diff --git a/set.mm b/set.mm index cba01bb92..1d3e86d27 100644 --- a/set.mm +++ b/set.mm @@ -127694,13 +127694,13 @@ this axiom (with the defined operation in place of ` + ` ) follows as a $( $j restatement 'ax-addf' of 'axaddf'; $) $( Multiplication is an operation on the complex numbers. This deprecated - axiom is provided for historical compatibility but is not a bona fide - axiom for complex numbers (independent of set theory) since it cannot be - interpreted as a first-order or second-order statement (see - ~ https://us.metamath.org/downloads/schmidt-cnaxioms.pdf ). It may be - deleted in the future and should be avoided for new theorems. Instead, - the less specific ~ ax-mulcl should be used. Note that uses of ~ ax-mulf - can be eliminated by using the defined operation + axiom is provided for historical compatibility. However, while Metamath + can handle it, it cannot be interpreted as a first-order or second-order + statement. We generally prefer simpler statements (see + ~ https://us.metamath.org/downloads/schmidt-cnaxioms.pdf ). This + deprecated axiom may be deleted in the future and should be avoided for + new theorems. Instead, the less specific ~ ax-mulcl should be used. Note + that uses of ~ ax-mulf can be eliminated by using the defined operation ` ( x e. CC , y e. CC |-> ( x x. y ) ) ` in place of ` x. ` , from which this axiom (with the defined operation in place of ` x. ` ) follows as a theorem.